Faults (Code Type Lxx Or Dxx) - DeDietrich AWHP 6 MR Installation And Service Manual

8. Troubleshooting
8.4

Faults (Code type Lxx or Dxx)

0 2 4 6 8
E
1 TEMP. : 68°
2
1
D
2 PCU. COM. FAIL. D27
bar
# F
% $
AUTO
J
0 2 4 6 8 10 12
E 1
TEMP. : 68°
2
1
D
2 PCU COM.FAIL D27
bar
F !
# 
% $
AUTO
J I
STD
Code Faults
D03 OUTL S.B FAIL.
D04 OUTL S.C FAIL.
D05 OUTSI.S.FAIL.
111
10 12 14 16 18 20 22 24
SUNDAY 11:45
!
 :
<
STD
C002604-B-04
14 16 18 20 22 24
SUNDAY 11:45
:
<
C002302-D-04
Cause Description
of the
fault
SCU Circuit B flow sensor fault
Circuit C flow sensor fault
Remarks:
The circuit pump is running.
The 3-way valve motor on the circuit is
no longer powered and can be adjusted
manually.
SCU Outside temperature sensor fault
Remarks:
The set point is equal to the MAX MIT
parameter.
The valve setting is no longer ensured
but monitoring the maximum
temperature of the circuit after the valve
is ensured.
Valves may be manually operated.
Reheating the domestic hot water
remains ensured.
1. Make a note of the code displayed.
The code is important for the correct and rapid diagnosis of the
type of failure and for any technical assistance that may be
needed.
2. Press the t key. If the code is displayed again, switch off the boiler
and then switch it back on.
3. Press the ? key. Follow the instructions displayed to solve the
problem.
4. Consult the meaning of the codes in the table below:
AWHP MIT-IN iSystem
Checking / solution
Bad connection
Check whether the sensor is connected:
4
¼ See chapter: "Deletion of
sensors from the memory in the PCB",
page 114
Check the link and the connectors
4
Check that the sensor has been correctly
4
fitted
Sensor fault
Check the Ohmic value of the sensor
4
Replace the sensor if necessary
4
Bad connection
Check whether the sensor is connected:
4
¼ See chapter: "Deletion of
sensors from the memory in the PCB",
page 114
Check the link and the connectors
4
Check that the sensor has been correctly
4
fitted
Sensor fault
Check the Ohmic value of the sensor
4
Replace the sensor if necessary
4
24/09/2012 - 300027606-001-01